This is the most powerful booster ever built by man, and it will be the driving force behind NASA's Space Launch System (SLS), the vehicle that will one day put humans on Mars. This engineering marvel will have its first major ground test tomorrow (Wednesday) at 11am EDT. »3/10/15 8:00pm 3/10/15 8:00pm

You might think NASA's not doing a lot these days, what with the dismantling of the manned space program and everything, but they're still making explosions. Now there's video: the J-2X, which NASA says is our next ticket to space. »11/10/11 4:40pm 11/10/11 4:40pm